Obviously, these characters, to some degrees, reflect my own viewpoints. I stated my own attitudes towards Marijuana in 9.11, Chapter 8, as seen through JP's introspection:
As far as alcohol consumption, Americans have a strange attitude towards it. We ban it (legally) for those who are under 21, yet it is all but a rite of passage for college students (aged 18 or so), who typically drink excessively (binge drinking). My personal opinion is that this behavior is a result of prohibition (limiting alcohol to age 21 and above) and it results in aberrant behavior for those who drink when they are younger.
As with so many things, if the consumption of marijuana and alcohol are done in moderation, they are usually not problematic.